When i was testing which buff ninjas to bring with Tendo I couldn't tell a difference between with or without a barrier, so I tend to side with Tendo mystery dispels barrier before it calculates damage.

Hi there! I've been using Pain - Tendo for quite sometime now, in GNWs, in Arena(When the mission is to use 2 Wind ninjas, so i go with Tendo, Konan and Jigokudo), in TI and SA .. Darui's barrier doesn't affect Pain - Tendo's Mystery Skill damage, as he dispells barriers first before casting his Mystery Skill(as you can see in the combo's in your left side, the Planetary Devastation shows twice) .. So, if you want to boost his damage, it is better to use Pain ninjas with him, like Chikushodo for Ninjutsu or Shurado for Taijutsu, if you have Hashirama, you c4n use him too with Tendo .. Like what we're doing in GNW, one of us will use a Pain Booster and me uses Hashirama for Ninjutsu boost ..

Tendo, differently from Roshi, first removes the barrier and then lands the damage. Roshi, instead, first lands the damage and then removes the barrier.

Yes bro, Roshi, not only removes the barrier, but also creates his own barrier "Burning Ocean" .. Just like Anko's Barrier